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A treatise on the virtues and efficacy of Oxley's concentrated essence of Jamaica ginger, recommended by Dr. George Pearson, ... As a most elegant and certain remedy for the relief and cure of nervous complaints, gout, palsy, rheumatism, and spasms, confirmed by a variety of interesting cases. Invented and prepared by Samuel Oxley, Her Majesty's chemist. Public Domain Mark. Source: Wellcome Collection.